Osmorhiza longistylisDC.

aniseroot

WFO wfo-0001067689 Accepted WFO 2026-06 7 photographs CC0 / CC BY

Plate 1 figs. a–g

Osmorhiza longistylis, photographed by Ryan Sorrells
fig. a Ryan Sorrells, CC BY 4.0 / 2022-05-26 / obs. 200859142
Osmorhiza longistylis, photographed by Ryan Sorrells
fig. b Ryan Sorrells, CC BY 4.0 / obs. 200863573
Osmorhiza longistylis, photographed by Ryan Sorrells
fig. c Ryan Sorrells, CC BY 4.0 / obs. 203408207
Osmorhiza longistylis, photographed by Brian Finzel
fig. d Brian Finzel, CC BY-SA 4.0 / obs. 205428852
Osmorhiza longistylis, photographed by Jeff Clark
fig. e Jeff Clark, CC BY 4.0 / obs. 200623736
Osmorhiza longistylis, photographed by Paul Roots
fig. f Paul Roots, CC BY 4.0 / obs. 199497327
Osmorhiza longistylis, photographed by Sarah Culliton
fig. g Sarah Culliton, CC BY 4.0 / obs. 198416600

Every figure is a research-grade observation under CC0, CC BY or CC BY-SA, rehosted with the photographer’s name, the licence and the observation it came from. Photographs under a NonCommercial licence are excluded from this site and are never stored, which costs us a great many pictures and is not negotiable.

Confused withby our own model

These are not lookalikes we guessed at. Each one is a species our identification model genuinely mistook for this plant, and how many times. The error rate is published.

Flowering n = 1,412 observations

Peak flowering in May, from 1,412 community-annotated observations worldwide. This is a global aggregate, not a forecast for your garden: the same species flowers on different dates in different hemispheres, and citizen-science records cluster near cities, at weekends, and in spring. Where a species has fewer than 30 annotated records we do not draw this chart at all.

Also published as 17 synonyms

A synonym is not an error. It is a record of botanists disagreeing, in print, about where this plant belongs. Each of these was somebody’s considered answer.

  • Myrrhis claytonii D.Dietr.
  • Myrrhis longistylis Torr.
  • Osmorhiza aristata var. longistylis (Torr.) B.Boivin
  • Osmorhiza cordata Raf.
  • Osmorhiza longistylis var. brachycoma S.F.Blake
  • Osmorhiza longistylis var. imbarbata Salamun
  • Osmorhiza longistylis var. longistylis
  • Osmorhiza longistylis var. villicaulis Fernald
  • Osmorhiza villicaulis Rydb.
  • Osmorhiza villosa Raf.
  • Scandix longistylis (Torr.) Koso-Pol.
  • Uraspermum aristatum subsp. longistyle (Torr.) Kuntze
  • Uraspermum aristatum var. longistyle Kuntze
  • Uraspermum aristatum var. villicaule Farw.
  • Washingtonia longistylis (Torr.) Britton
  • Washingtonia longistylis var. bracycoma House
  • Washingtonia villicaulis J.M.Coult. & Rose

Sourcesevery claim on this page

  1. World Flora Online Plant List. accepted name, authority, classification. CC0. Retrieved 2026-07-12.
  2. iNaturalist. photographs and flowering annotations, CC0 / CC BY / CC BY-SA only. per photograph. Retrieved 2026-06-27.

We publish what we can source and we say so when we cannot. This page has no care advice, no toxicity claim and no native range, because we do not yet have those from a source we can cite.